能源利用效率：汽车 85%,35%,10%,1%? 2.6% 4.2% 《燃烧学基础》1，绪论 陈证(cz@pku.edu.cn)19 内燃机热效率提高 Where does the energy go? Transionofthemalefcencycdgasolneengne Thermal effici oduced engine:max.-40% 2000 2010 02 Gross thermal efficiency ~37.6% (0ida2017刀 Ideal Carnot efficiency ~1-300/1800=83% Otto cycle efficiency:68%(compression ratio of 17) 《燃烧学基础》1，绪论 陈正(cz@pku.edu.cn20 澦࢖䏝؅ׁक澧ͬ ঠ੥ ୟࠔ I`&VQ[KJ[IT 㜳Ⓠ࡟⦽᭾⭞φ⊳䖜  20.4ˁ 85%, 35%, 10%, 1% ? 0.4ˁ 澦࢖䏝؅ׁक澧ͬ ঠ੥ ୟࠔ I`&VQ[KJ[IT ޻⟹ᵰ✣᭾⦽ᨆ儎 20 Gross thermal efficiency ~ 37.6% Ideal Carnot efficiency ~ 1-300/1800=83% Otto cycle efficiency: 68% (compression ratio of 17) (lida 2017)